Lug nut



FIG. 1 is a reduced perspective view of a lug nut showing my new design;

FIG. 2 is an end elevational view taken from the left of FIG. 1;

FIG. 3 is a side elevational view thereof;

FIG. 4 is an end elevational view taken from the right of FIG. 1.

The ornamental design for a lug nut, as shown and described.